HU-PYXIS
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PYXIS
System User Guide
5.1.6 Audio Reference (UNBALANCED AES, BALANCED AES)
A BNC connector is provided for unbalanced AES reference input. The balanced AES input is available
on the 9-Way D-Type with the LTC and Relay Data (refer to section 5.1.5 for pin out details).
The unbalanced reference has a 75
Ω
termination, balanced uses 110
Ω
.
An audio reference is always required when audio modules are fitted; the audio crosspoint(s)
are synchronous and use the audio reference
.
Physically only one audio reference (balanced or unbalanced) should be connected to a Master
frame, connecting both will stop the audio router module(s) functioning correctly.
The reference is automatically detected on the controller cards – there are no switch settings
required.
5.1.7 Video Reference (REF1, REF2, REF3)
The 3U Pyxis provides connections for three loop-through video reference inputs. The Pyxis uses the
reference (when allocated correctly to a source) to switch between sources in accordance with SMPTE
RP168. If no references are present the Pyxis will ‘crash’ switch sources.
In addition to the references being present their use depends on the system database being configured
so each source is allocated the correct reference. Allocation of references is done using the appropriate
editor/configuration tool for the Nebula controller or Nucleus controller. Please refer to the appropriate
manual for details.
All video references are loop-through connections. The 2449 controller will indicate (via LEDs) when
each reference has been recognised, see section 4.2.5.9 for details.
VIDEO REF 1
: referenced as 525 Black & Burst in Nebula (2449) standard database
VIDEO REF 2
: referenced as 625 Black & Burst in Nebula (2449) standard database
VIDEO REF 3
: referenced as HD Black & Burst or Tri-Level in Nebula (2449) standard database
